Move some generic functions to AudioManagerBase to be inherited by platform-specific AudioManager***

media/audio/android/audio_manager_android.cc

Index: media/audio/android/audio_manager_android.cc
diff --git a/media/audio/android/audio_manager_android.cc b/media/audio/android/audio_manager_android.cc
index 0170675a43442425ab0e0d83597ec848707282a1..24ef0af52752ec162690b5a3b2a189964442b410 100644
--- a/media/audio/android/audio_manager_android.cc
+++ b/media/audio/android/audio_manager_android.cc
@@ -8,7 +8,9 @@
 #include "media/audio/android/audio_track_output_android.h"
 #include "media/audio/audio_manager.h"
 #include "media/audio/fake_audio_input_stream.h"
-#include "media/audio/fake_audio_output_stream.h"
+
+// Maximum number of output streams that can be open simultaneously.
+static const int kMaxOutputStreams = 10;
 
 AudioManager* CreateAudioManager() {
   return new AudioManagerAndroid();
@@ -28,29 +30,38 @@ bool AudioManagerAndroid::HasAudioInputDevices() {
   return false;
 }
 
-AudioOutputStream* AudioManagerAndroid::MakeAudioOutputStream(
-    const AudioParameters& params) {
-  if (!params.IsValid())
-    return NULL;
+void AudioManagerAndroid::MuteAll() {
+  NOTIMPLEMENTED();
+}
 
-  if (params.format == AudioParameters::AUDIO_MOCK)
-    return FakeAudioOutputStream::MakeFakeStream(params);
-  if (params.format == AudioParameters::AUDIO_PCM_LINEAR ||
-      params.format == AudioParameters::AUDIO_PCM_LOW_LATENCY)
-    return AudioTrackOutputStream::MakeStream(params);
+void AudioManagerAndroid::UnMuteAll() {
+  NOTIMPLEMENTED();
+}
 
-  return NULL;
+int AudioManagerAndroid::GetMaxOutputStreamsAllowed() {
+  return kMaxOutputStreams;
 }
 
-AudioInputStream* AudioManagerAndroid::MakeAudioInputStream(
-    const AudioParameters& params, const std::string& device_id) {
-  return FakeAudioInputStream::MakeFakeStream(params);
+AudioOutputStream* AudioManagerAndroid::MakeLinearOutputStream(
+      const AudioParameters& params) {
+  DCHECK_EQ(AudioParameters::AUDIO_PCM_LINEAR, params.format);
+  return AudioTrackOutputStream::MakeStream(params);
 }
 
-void AudioManagerAndroid::MuteAll() {
-  NOTIMPLEMENTED();
+AudioOutputStream* AudioManagerAndroid::MakeLowLatencyOutputStream(
+      const AudioParameters& params) {
+  DCHECK_EQ(AudioParameters::AUDIO_PCM_LOW_LATENCY, params.format);
+  return AudioTrackOutputStream::MakeStream(params);
 }
 
-void AudioManagerAndroid::UnMuteAll() {
-  NOTIMPLEMENTED();
+AudioInputStream* AudioManagerAndroid::MakeLinearInputStream(
+    const AudioParameters& params, const std::string& device_id) {
+  DCHECK_EQ(AudioParameters::AUDIO_PCM_LINEAR, params.format);
+  return FakeAudioInputStream::MakeFakeStream(params);
+}
+
+AudioInputStream* AudioManagerAndroid::MakeALowLatencyInputStream(
+    const AudioParameters& params, const std::string& device_id) {
+  DCHECK_EQ(AudioParameters::AUDIO_PCM_LOW_LATENCY, params.format);
+  return FakeAudioInputStream::MakeFakeStream(params);
 }